31120222223112 has 128 divisors (see below), whose sum is σ = 84966855120000. Its totient is φ = 9419983677440.

The previous prime is 31120222223081. The next prime is 31120222223119. The reversal of 31120222223112 is 21132222202113.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (31120222223119) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1321497514 + ... + 1321521062.

It is an arithmetic number, because the mean of its divisors is an integer number (663803555625).

Almost surely, 2^{31120222223112} is an apocalyptic number.

It is an amenable number.

31120222223112 is an abundant number, since it is smaller than the sum of its proper divisors (53846632896888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31120222223112 is a wasteful number, since it uses less digits than its factorization.

31120222223112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28871 (or 28867 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 31120222223112 its reverse (21132222202113), we get a palindrome (52252444425225).

The spelling of 31120222223112 in words is "thirty-one trillion, one hundred twenty billion, two hundred twenty-two million, two hundred twenty-three thousand, one hundred twelve".